Buffing machine



May 3, 1932. F. E. BERTRAND BUFF-ING MACHI NE Filed June 24. 1927 /N VENTUF? Patented May 3, 1932 UNITED @"l'rhlhd PATENT OFFICE FREDERIC E.BERTRAND, F LYNN, MASSACHUSETTS, ASSIGNOR T0 UNITED SHOE MA- CHINERYCORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEYIBUFFING- MACHINE Application filed June 24, 1927. Serial No. 201,243.

This invention relates to butting machines and is herein illustrated asembodied in a Naumkeag butting machine of the type shown in UnitedStates Letters Patent No. 849,388

' granted April 2, 1907 upon the application of A. Rogers.

Buffing machines of the Naumkeag type having relatively coarse and finedisk-like abrasive tools mounted side bv side upon the 10 lower ends ofvertical spindles are employed for bufling the bottoms and shanks ofshoes. In certain cases, as, for example, where the shoe (considered ininverted position) has a Cuban heel in which the breast is not normal tothe shank so that it overhangs the joint between the breast and theshank, it is not convenient to treat the shank of the shoe close to thebreast of the heel with the regular tools provided on the machinebecause of the interference between the overhanging breast and thespindles of the tools. This interference is avoided by the use ofNaumkeag machines of the type disclosed in United States Letters PatentNo. 1,806,626,

granted May 26, 1931, upon the application of E. F. Hodgkins. In themachine disclosed in that application, there is provided, in place ofone of the regular tools, an auxiliary tool mounted upon the lower endof a short vertical spindle and adapted and constructed to treat theshank close to the heel breast, the short spindle carrying the auxiliarytool being rotated at high speed whenever the machine is in operation bya driving connection with an offset parallel spindle passing ject ofthis invention to provide an improved bufling machine which will be soorganized that it will be entirely practicable to employ relativelycoarse and line buffing tools in addition to the auxiliary tool withoutrequiring the operator to reach too far in presenting the worksuccessively to the various tools, and which at the same time will be soconstructed and arranged that the auxiliary tool will not be in theoperators way when he presents work to either of the main tools of themachine. To this end, the illus trated buffing machine is provided withan auxiliary tool mounted on a movable bracket which may be swung tocarry the auxiliary tool into an operative position adjacent to butoffset from the main tools, or may be swung aside to avoid interferencewith the work when it is presented to either of the main tools.Preferably, and as illustrated, the tool is normally held in inoperativeposition, means controlled by the operator being provided to swing thebracket and carry the auxiliary tool into operative position wheneverdesired.

In regular factory use the bulk of the Work of bufiing soles and shanksis preferably performed by the use of one or both of the main buiiingtools since these, because of their relatively large diameters, areadapted for buffing more rapidly. Accordingly, the auxiliary tool isusually operated intermittently for short periods of time only. Withthis in mind, to avoid unnecessary wear of the auxiliary tool drivingparts, movement of the illustrated bracket to carry the auxiliary toolout of operative position unclutches the auxiliary tool from its drivingmeans, reverse movement of the bracket to carry the auxiliary tool intooperative position restoring the driving connection.

In the drawings,

Fig. 1 is a front elevation of a portion of a Naumkeag butting machineshowing one of the main tools of the machine and my novel auxiliary toolsupport;

Fig. 2 is a plan view of this portion of the machine Fig. 8 is a sideelevation looking at the left side of Fig. 1 with parts broken away; and

Fig. 4 is a vertical section through the auxiliary tool. a

Only one tool 10 of the usualpair of diskshaped main tools of a Naumkeagbufiing machine is shown in Fig. 1. This tool 10 is carried by the lowerend of a vertical spindle ill) 12 which is journaled in bearings 14 and16 in the frame 18 of the machine and a connection 20 is provided at thetop of the spindle so that air may be supplied through said spindle toinflate a' tool carried thereon when it is of the inflatable type. Adriving connection for this spindle is provided by means of a pulley 22on the spindle 12 and a belt 24, and a suction hood 26 is positioned atthe rear of said tool 10.

1 An auxiliary buffing tool 30, also, disk: shaped, and of relativelysmall diameter so that it is effective, independently ofthe main tool,for treating the shank of a shoe 32 having an overhanging Cuban heel 48is mounted upon the lower end of a short spindle 34 (Fig. 4) journaledin a casing 36 which serves also as a bearing for a parallel drive shaft38 connected to the short spindle 34 by means of intermeshing gears 40.A removable bottom cover 42 is secured to the lower end of the casing 36and serves to retain the short spindle in the casing. Lubrication isprovided by means of a felt pad 44 secured to the casing 36 adjacent tothe top of the spindle 34 and abutting the shaft 38. It should be notedthat the casing 36 and the pad 44 are cut away at 46 to avoidinterference with the breast of the heel 48 of the shoe 32. Theauxiliary tool 30, together with its casing 36 and driving gears 40, issimilar to the tool disclosed in the above-mentioned Letters Patent No.1,806,626.

The auxiliary tool 30 is mounted in a movable bracket 54, its casing 36being extended upwardly in the form of a sleeve 50 which is clamped inthe bifurcated outer end 52 of the bracket 54, the inner end of which isbifurcated to form an upper arm 56 and a lower. arm 58.' These arms fitclosely around an extension 60 of the frame of the machine and arepivoted upon a pin 62 which is held in said extension by a set screw64.' The displaceable bracket 54 is normally yieldingly urged to aposition (indicated in dotted lines in Fig.

2) to move the auxiliary tool to a position where it will not interferewith work being presented to the tool 10, by means of aspring 66surrounding and secured at one end to the upper end of the fixed pin 62.The other end of the spring 66 is attached to the bracket 54. Anoperator-controlled means including a treadle-operated rod 70 isprovided for moving the auxiliary-tool bracket 54 to bring the tool intoconvenient operating position adjacent to but displaced from the maintool 10 when itis desired to use the auxiliary tool; This operatingposition of V and 3) of a bell crank lever 7 4, the other upundue wearof the small and in full lines in Fig. 2, thereby giving room for theconvenient manipulation of the shoe 30 as it. is presented to theauxiliary tool. The treadle. rod70 is'connected to one'arm-72- (Figs. 2.

wardly extending arm 76 of which is provided with a swivel pin 78 joinedby a link 80 to a smaller swivel pin 82 at the other end of a crank 84(Fig. 2) forming part of the bracket 54. The bell crank lever 7 4 ispivoted upon a lug 86 (Figs. 2 and 3) formed upon theframe extension 60.When the bracket 54 is biased to inoperative position by the spring 66,its position is determined by the engagement ofa finger 90 (Fig. 2) onsaid bracket with a stop pin 92 on the extension-60 and when the bracketis moved to bring the tool to operating position, the latter position isadjustably determined by the engagement of a; finger 94 (also on thebracket 54) with an adjustable stop bolt 96threaded in the frameextension 60.

Because of the fact that the auxiliary tool 30 is only intended forintermittent use, it'is desirable to interrupt the driving connection tothe auxiliary tool when the latter is in inoperative or displacedposition, and to reconnect it when it is in operative position. In theillustrated construction, this connection and interruption are effectedautomatically upon the movement of the bracket 54 into and out ofoperating position. As shown, the shaft 38 which drives the auxiliarytool spindle 34 is connected by a belt 100 with a counter shaft 102journaled in the bracket 54 in the angle between the end 52 and theother end formed by the arms 56 and 58 (Fig. 2). This counter shaft102is provided with a crowned friction wheel 104 adapted to engagetheconcaved face of a grooved wheel 106 on the spindle 12 carryingthemaintool 10 thereby to provide a friction. clutch for driving theauxiliary tool. When the opera tor swings the bracket 54 to bring theauxiliary tool 30 into operating position, the friction clutch will beclosed by bringing the crowned wheel '104 into engagement with thegrooved wheel 106. This arrangement for the interruption of the drive ofthe auxiliary tool 30 is especially desirableto save gears 40 which turnat high speed.

When the operator has buffed the shank of the shoe 32 as completely ascan convenientlybe done uponthe main tool 10 or its conipanion tool (notshown) of the machine, he will depress the treadle rod 70 therebybringing the auxiliary tool 30 into operating position adjacent to butoffset from the illus-v trated tool 10 so that said auxiliary tool 30may be used to complete the treatment of the shank of the shoe close-upto the-breast of the heel 48. As the bracket 54 is'swung,

upon the depression ofpthe treadle rod'70, the

friction clutch will be closed to start driving the auxiliary tool 30and as soon as the pressure on-the treadle is released,the drivingconnection .will be. interrupted as the bracket 54 is yieldinglyurgedinto inoperative posi tion by the action of the spring 66 acting onthe arm 56.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent of the United States is:

1. In a shoe buffing machine, a main diskshaped bailing tool having aradial face, an auxiliary disk-shaped butting tool having a radial workface for independently supplementing the work done by the main tool andmovable from a convenient operating position adjacent to and axiallyofl'set from the main tool to an inoperative position in which it willnot interfere with presentation of shoes to the main tool, means fordetermining both said operating position and said in operative positionof said auxiliary tool, and a driving connection between said toolsrendered ineli'ective by the movement of the auxiliary tool out ofoperating position.

2. In a shoe bufling machine, a main bufiing tool mount-ed upon aspindle, a high speed auxiliary butting tool mounted upon anotherspindle for independently supplementing the work done by the main tool,movable means normally supporting said last-named spindle in a positionout of the way of the operator as he presents shoes to the main tool,opera-- tor-controlled means for moving the auxiliary tool to aconvenient operating position adjacent to and axially offset from themain tool, and means for driving said auxiliary tool including afriction clutch constructed and arranged to be rendered ineifective bythe movement of the auxiliary tool out of operating position.

3. In a landing machine, a shank bufling tool mounted upon a verticalspindle, an auxiliary shank buffing tool mounted upon a spindle, saidspindles being disposed in parallel relation to each other, a driveshaft for said second mentioned spindle geared thereto, a pivotedbracket supporting said drive shaft and said auxiliary tool spindle, acounter shaft journalled in said bracket in ofi'set relation to saiddrive shaft, means for connecting said counter shaft and said driveshaft, a friction clutch member upon said counter shaft, a cooperatingfriction clutch 0 member upon the spindle of said main tool, and meansfor swinging said bracket to bring the auxiliary tool into a convenientoperating position adjacent to but offset from said main tool, theswinging movement of the a", bracket being effective to effectengagement of the friction clutch members to drive the auxiliary tool.

In testimony whereof I have signed my name to this specification.

t0 FREDERIC E. BERTRAND.

